{"product_id":"walker-250-25166-oxygen-sensor-center-downstream-or-upstream","title":"Walker 250-25166 Oxygen Sensor - Center, Downstream or Upstream","description":"\u003ch2\u003eOverview of Walker OE Base Sensor 250-25166\u003c\/h2\u003e\u003cp\u003eThe Walker OE Base Sensor 250-25166 is a heated wide-band oxygen sensor designed for specific vehicle applications including Audi, BMW, Hyundai, Kia, and Volkswagen models. Engineered to provide accurate air-fuel mixture readings, this sensor supports optimal engine performance and emission control.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHeated wide-band oxygen sensor for precise air-fuel ratio monitoring\u003c\/li\u003e\n\u003cli\u003eSpecific fit for select Audi, BMW, Hyundai, Kia, and Volkswagen vehicles\u003c\/li\u003e\n\u003cli\u003eSpade terminal type with 6 male terminals and 5 wires\u003c\/li\u003e\n\u003cli\u003eOblong female connector for secure electrical connection\u003c\/li\u003e\n\u003cli\u003eThread size M18 - 1.5 with 22mm wrench size for installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWalker OE Base Sensor Product Line Details\u003c\/h2\u003e\u003cp\u003eThe OE Base Sensor line by Walker focuses on delivering sensors that meet original equipment specifications for emission control systems. The 250-25166 oxygen sensor is part of this line, ensuring compatibility and reliable performance for the specified vehicle models. This product line emphasizes precise sensor technology and fitment accuracy to maintain factory-level emissions compliance.\u003c\/p\u003e\u003ch2\u003eTechnical Description and Features\u003c\/h2\u003e\u003cp\u003eThis oxygen sensor features a heated wide-band design, which allows for faster sensor response and improved fuel management. The sensor’s spade terminal type with six male terminals and a female oblong connector ensures a secure and stable electrical connection. With five wires, it supports complex signal transmission required by modern engine control units. The sensor’s thread size of M18 - 1.5 and 22mm wrench size facilitate straightforward installation in compatible exhaust systems.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCompatible with Audi models such as A3, A3 Quattro, CC, Eos, Q7, TT Quattro, and TTS Quattro\u003c\/li\u003e\n\u003cli\u003eFits BMW 335d, 535d, and 535d xDrive models\u003c\/li\u003e\n\u003cli\u003eSuitable for Hyundai Elantra, Elantra Coupe, Elantra GT, Kia Forte, Forte5, Forte Koup, and Soul\u003c\/li\u003e\n\u003cli\u003eDesigned for Volkswagen Golf R and GTI, as well as X5\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCommon Issues Addressed by This Oxygen Sensor\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eIncorrect air-fuel mixture readings causing poor fuel economy\u003c\/li\u003e\n\u003cli\u003eCheck engine light triggered by faulty oxygen sensor signals\u003c\/li\u003e\n\u003cli\u003eIncreased emissions due to sensor malfunction\u003c\/li\u003e\n\u003cli\u003eEngine performance issues such as rough idling or hesitation\u003c\/li\u003e\n\u003cli\u003eFailed emissions tests related to sensor degradation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eInstallation requires a 22mm wrench to remove and replace the sensor. Ensure the sensor thread size M18 - 1.5 matches the vehicle’s exhaust port. The specific fitment means this sensor is designed for direct replacement without modification. Handle the sensor carefully to avoid damage to the heated element and wiring. Verify connector orientation and terminal alignment before securing the connection.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eWalker OE Base Sensors are manufactured to meet or exceed OEM standards for durability and performance. While specific warranty details are not provided here, Walker products typically come with a limited warranty covering defects in materials and workmanship. This ensures reliable operation and peace of mind when replacing oxygen sensors on compatible Audi, BMW, Hyundai, Kia, and Volkswagen vehicles.\u003c\/p\u003e","brand":"Walker","offers":[{"title":"Default Title","offer_id":52119368564917,"sku":"DKHD-250-25166","price":104.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/O2_25025166_Fro.jpg?v=1775162301","url":"https:\/\/www.partcatalog.com\/products\/walker-250-25166-oxygen-sensor-center-downstream-or-upstream","provider":"PartCatalog","version":"1.0","type":"link"}